Applied Statistics and Probability for Engineers
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Defensive Security Handbook: Best Practices for Securing Infrastructure
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Hack and HHVM: Programming Productivity Without Breaking Things
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Mostly Harmless
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The Hitchhiker's Guide to the Galaxy (5)
The Book of PF: A No-Nonsense Guide to the OpenBSD Firewall
Peter N. M. Hansteen
Absolute FreeBSD: The Complete Guide to FreeBSD, 2nd Edition
Michael W. Lucas